Sash-lock.



No. 729,916. PATENTLD` JUNE 2, 1903. G. LBBLL.V

` sAsH LoGK. APPLIOATION FILED DEO. 20, 1902.

N0 MODEL.'

iU/NiTnn STATES Patented Tune 2, 1903.

PATENT OFFICE.

GEORGEAA. BELL, OF NORWALK, CON-ECTICUT.

gjEEClFICATION forming partof Letters Patent No. 729,916, dated June 2,1903. Application filed December Z0, 1902. Serial No. 136,078.(No-model.)

.To LZZ whom, t may concern,.-

e it known that I, GEORGE A. BELL, a citizen of the United States,residing' at Norwalk, county of Fairfield, State of Connecticut, haveinvented a new and useful Sash- Lock, of which the following is aspecification.

This invention relates to the class of sashlocks that are attached tothe meeting-rails of lower sashes. f

It is one of the objects of this invention to provide a sash-lock whichshall be neat and attractive in' appearance, simple in construction, andof little cost, which requires no cutting away or marring of the wood ofY either sash or casing, andwhich may be appliedby any person who may beskilled or unskilled in the use of tools and without other tools than ascrew-driver.

A further object of the invention is to pro vide a sash-lock comprisingtwo pieces only and a pivot andwhich shall be so constructed that thelocking-dog may be thrown and will remain wholly out of the way when itis not desired to lock the sashes.

A further obj ect of the invention isto provide a sashiastener whichwill lock both sashes simultaneously in any position in which they maybe placed against movement in either direction by crowding the side railof the upper sash against the outer bead and the side rail of the lowersash against the inner bead.

It is a further object of the invention to provide a sashlzlock whichshall be so constructed that the strength of the frictional engagementof the sashes with the beads shall he dependent upon the power exertedto move either sash toward the open position. That is to say,whileeither sash may bemoved from the outside toward the closed position,

the instant any attempt is made to move theupper sash downward or thelower Asash upward the locking-dog will act to lock both -sashes inposition, and the greater the pres-AV sure exerted to move either sashthe stronger will be the frictional `engagement of the sashes withtheouter and inner beads, re-.

lith these and other objects in View the invention consists `in certainconstructions and in certain partis, improvements, and combinationswhich will be hereinafter described and then speciiically pointed out inthe claims hereunto appended.

In the accompanyingv drawings, forming part of this specification,Figure 1 is an elevation showing the application of my novel sash-lockto the meeting-rail of a lower sash and indicating the manner in whichboth sashes may be locked in a partially-open position; Fig. 2, anenlarged detail sectional view on the line 2 2 in Fig. l, thelocking-dog being shown in full lines in the locking position and indotted lines in the retracted position; Fig. 3, a plan View,corresponding with Fig. 2, showing. the locking-dog inthe retractedposition; Fig. 1i, a view corresponding with Fig. 3, except that thelocking-dog is removed, showing the manner in which the attaching-plateis secured to the meetingrail; and Fig. 5 is a detail cross-section ofthe casing on the line 5 5 in Fig. 1, showing the two sashes in plan andthe manner in which they are locked by being crowded against the outerand inner beads, respectively.

A denotes the upper sash; B, the lower sash, i

and C the casing. For convenience I will indicate the upper rail of theupper sash by 10, the side rail of the upper sash by 11, themeeting-rail of vthe upper sashby l2, the meeting-rail of the lower sashby 13, the side rail of the lower sash by 14, the lower rail of thelower sash by 15, the outer bead by .16, the parting-bead by 17, and theinner bead by 1S.

My novel sash-lock comprises two parts only, to wit: A locking-dog 1)and an attachin g-platc E, to which itis pivoted. Ihave shown theattaching-plate as provided with sideplates `19 Aand `the locking-dog aspro- Avided with acurved engaging face 20, which may or may not beserrated; a finger-piece 21,

and a sh ank 22, which is pivoted between the `side plates, as at 23.

Thelower end of the shank is so shaped as to form a stop 24, (seedotted" lines, Fig. 2,) which engages the at- IOO course be obvious thatthe special shape or configuration of both locking-dog andattaching-plate are unimportant so far as the principle of the inventionis concerned, it being simply essential that the point of engagement offace 2O with the side rail of the upper sash when in the extreme lockingposition shall be slightly above ahorizontal line drawn through thepivotal point of the locking-dog to the side plates, so that whenpressure is exerted either to force the upper sash downward or the lowersash upward the lockingdog will act on the principle of a toggle andwill force the side rail of the upper sash against the outer bead andthe side rail of the lower sash against the inner bead with greatpressure, increasing with the power applied to move the sash, so that,in fact, movement of either sash towardl the open position is madepractically impossible.

In order to provide a convenient mode of adjusting the sash-lock whenattaching it to the meeting-rail so that it will assume the correctbinding position, I provide the attaching-plate with a hole 25, having arearwardly-extending slot 26. A screw 27, having a head smaller thanhole 25, is turned partly down into the meeting-rail of the lower sash.The sash-lock is then placed in position, the head of screw 27'passingthrough hole 25 in the attaching-plate. The sash-lock is then movedforward, the shank of screw 27 passing into the slot until face 2O ofthe locking-dog when in the eXtreme locking position will be slightlyabove a horizontal line drawn through pivot 23, as clearly shown in Fig.2. Screw 27 is then turned down, the head of the screw engaging the topof the attachingplate on opposite sides of the slot and holding saidplate in place, where it is permanently secured by a screw 2S, passingthrough a hole in the rear end thereof.

As is well known, the amount of play which two sashes may haverelatively to each other varies in different windows according to thethickness of the parting-bead 17 and the closeness of setting of thebeads 16 and 18 relatively to the sashes. By the construction ofattaching-plate as just described the locking-dog may first betemporarily adjusted so that the proper angle for the bind or lock maybe obtained, and then it may be permanently secured. the attaching-platemay be iirst set well forward and then the locking dog Vturned againstthe upper sash and one sash moved relatively to the other until it isfound that the dog binds, when it is in a position but slightly abovethe horizontal line drawn through the pivot 23. r1`he attaching-platewhen only temporarily adjusted is suiiso far as the operativeness Thauis, Y

ciently free to slip or be forced backward until the locking-dog assumesthe position just described. Then the screw 27 is turned down tight andthe screw 28 inserted to secure the device permanently in theproperlyadjusted position.

The operation of this sash-lock will be readily understood from thedrawings and is so perfectly simple as not to require explanation. It isof course wholly immaterial is concerned whether one sash is partly openand the other closed or whether both are closed or both partly open. Tolock both sashes instantly in any position in which they may be placed,the locking-dog is simply thrown from the position shown in dotted linesin Fig. 2 to the position shown in full lines in said iigure. No othermovement is required nor any pressure or sett-in g of any part of thedevice. When the locking-dog is in the locking position, either sash maybe moved toward the closed position from either side; but any attemptmade to move either sash toward the open position locks them bothtightly and the greater the power exerted to move them the more securelywill they be locked in place. Uien the locking-dog is thrown to theretracted position, as in Fig. 2, both sashes may be moved up or downfreely without hindrance by the locking-dog,` which will remain out oflocking position by gravity until thrown into the locking position, inwhich position it will remain until thrown out again.

Having thus described my invention, I claim- 1. A sash-lock comprisingan attachingplate, and a locking-dog pivoted thereto, means fortemporarily adjusting the lockingplate while permitting it to be forcedto change its position, and means for permanently securing theattaching-plate after securing the adjustment.

2. A sash-lock comprising a locking-dog and an attaching-plate to whichthe lockingdog is pivoted, said attaching-plate having a hole throughwhich the head of a screw may pass and a rearwardly-extending slotadapted to receive the shank of a screw but not the head so that theplate may be temporarily adjusted, and an additional screw forpermanently holding the attaching-plate when adjusted. 4

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE A. BELL.

itnessesz A. M. WoosrER, S. XV. ATHERTON.

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